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// Portions Copyright [2019] Payara Foundation and/or affiliates

package com.sun.enterprise.connectors.util;

import java.io.Writer;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Writer that will be given to / used by MCF, MCs of resource adapter<br>
 * PrintWriter will be set during MCF initialization<br>
 */
public class RAWriterAdapter extends Writer {
    private Logger logger;
    //by default, autoFlush will be ON.
    private boolean autoFlush = true;
    //buffer used when autoFlush is OFF
    private StringBuffer log;

    public RAWriterAdapter(Logger logger) {
        this.logger = logger;
        initializeAutoFlush();
    }

    private void initializeAutoFlush() {
        String autoFlushValue = System.getProperty("com.sun.enterprise.connectors.LogWriterAutoFlush", "true");
        autoFlush = Boolean.parseBoolean(autoFlushValue);
    }

    public void write(char cbuf[], int off, int len) {
        if (autoFlush) {
            logger.log(Level.INFO, new String(cbuf, off, len));
        } else {
            String s = new String(cbuf, off, len);
            if (log == null) {
                log = new StringBuffer(s);
            } else {
                log = log.append(s);
            }
        }
    }

    public void flush() {
        if (!autoFlush) {
            logger.log(Level.INFO, log.toString());
            log = null;
        }
    }

    public void close() {
        //no-op
    }
}
